Welcome to FF Jonathan! Agree with DV comments in that flipping behavior is indicative of stress and temps are too low.
Have you read this article: Frog Forum - Pacman and Horned Frogs - Ceratophrys - Care and Breeding. Also, here is link to questions you need to answer in order for us to fully address situation: http://www.frogforum.net/pacman-frog...enclosure.html. Not sure I understand, but do you mean frog has eaten a couple crickets and a worm in 2 weeks?